The word(s) "strength" appears 31 time(s) in 29 verse(s) in Quran in Muhammad Pickthal translation.

(21) He said: I have been given it only on account of knowledge I possess. Knew he not that Allah had destroyed already of the generations before him men who were mightier than him in strength and greater in respect of following? The guilty are not questioned of their sins.

(22) Allah is He Who shaped you out of weakness, then appointed after weakness strength, then, after strength, appointed weakness and grey hair. He createth what He will. He is the Knower, the Mighty.

(23) He whom we bring unto old age, We reverse him in creation (making him go back to weakness after strength). Have ye then no sense?

(24) He it is Who created you from dust, then from a drop (of seed) then from a clot, then bringeth you forth as a child, then (ordaineth) that ye attain full strength and afterward that ye become old men - though some among you die before - and that ye reach an appointed term, that haply ye may understand.

(25) And We have commended unto man kindness toward parents. His mother beareth him with reluctance, and bringeth him forth with reluctance, and the bearing of him and the weaning of him is thirty months, till, when he attaineth full strength and reacheth forty years, he saith: My Lord! Arouse me that I may give thanks for the favour wherewith Thou hast favoured me and my parents, and that I may do right acceptable unto Thee. And be gracious unto me in the matter of my seed. Lo! I have turned unto Thee repentant, and lo! I am of those who surrender (unto Thee).

(26) Muhammad is the messenger of Allah. And those with him are hard against the disbelievers and merciful among themselves. Thou (O Muhammad) seest them bowing and falling prostrate (in worship), seeking bounty from Allah and (His) acceptance. The mark of them is on their foreheads from the traces of prostration. Such is their likeness in the Torah and their likeness in the Gospel - like as sown corn that sendeth forth its shoot and strengtheneth it and riseth firm upon its stalk, delighting the sowers - that He may enrage the disbelievers with (the sight of) them. Allah hath promised, unto such of them as believe and do good works, forgiveness and immense reward.

(27) Thou wilt not find folk who believe in Allah and the Last Day loving those who oppose Allah and His messenger, even though they be their fathers or their sons or their brethren or their clan. As for such, He hath written faith upon their hearts and hath strengthened them with a Spirit from Him, and He will bring them into Gardens underneath which rivers flow, wherein they will abide. Allah is well pleased with them, and they are well pleased with Him. They are Allah's party. Lo! is it not Allah's party who are the successful?

(28) O ye who believe! Be Allah's helpers, even as Jesus son of Mary said unto the disciples: Who are my helpers for Allah? They said: We are Allah's helpers. And a party of the Children of Israel believed, while a party disbelieved. Then We strengthened those who believed against their foe, and they became the uppermost.

(29) We, even We, created them, and strengthened their frame. And when We will, We can replace them, bringing others like them in their stead.